Arm chair or similar article



FIG. 1 is a top front perspective view of an armchair or similar article embodying my new design;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a side perspective view taken from the right thereof;

FIG. 4 is a top perspective view thereof; and

FIG. 5 is a rear perspective view thereof.

The side perspective view from the left thereof is the mirror image of FIG. 3. 

The ornamental design for an armchair or similar article, as shown and described. 